A sex act wherein the man shaves off all of his pubic hair so that his flaccid genitals resemble a dead bird, and coats his crotch in butter. He then drags his testicles across the face of his sleeping significant other, whilst gobbling like a turkey. Especially popular during the holiday season.

Autumn was angry when Patrick woke her on Thanksgiving morning with an especially greasy butterball.

when a hot chick wants to fuck and you or a friend or brother is to dumb or drunk to fuck.....
the hot chick shoves the persons ball sack in to her butt thus giving the nick name the butter ball. yes this actually happened!